Added a nuget.config
Added a nuget.config

ScottShingler/NuGetGallery,grenade/NuGetGallery_download-count-patch,mtian/SiteExtensionGallery,grenade/NuGetGallery_download-count-patch,ScottShingler/NuGetGallery,skbkontur/NuGetGallery,mtian/SiteExtensionGallery,ScottShingler/NuGetGallery,mtian/SiteExtensionGallery,projectkudu/SiteExtensionGallery,projectkudu/SiteExtensionGallery,skbkontur/NuGetGallery,projectkudu/SiteExtensionGallery,skbkontur/NuGetGallery,grenade/NuGetGallery_download-count-patch